To get the power cord through such a small hole, did you have to cut and then rewire it? what did you do to re-seal and waterproof it and make sure that it can't be pulled apart again?

I know you used silicon to fill the endcap for the leakproofing, but (assuming you did cut then re-wire and did it on the end of the cord that is not inside the canister) what did you do to prevent water from getting into the wires should something leak or should water spill along the cord during a water change, etc? I would think that electrical tape wouldn't hold up tp much water so wouldn't use that, necessarily.